1288870779564 has 18 divisors (see below), whose sum is σ = 3257978915100. Its totient is φ = 429623593176.

The previous prime is 1288870779557. The next prime is 1288870779583. The reversal of 1288870779564 is 4659770788821.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×1288870779564² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1288870779492 and 1288870779501.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17900983014 + ... + 17900983085.

Almost surely, 2^{1288870779564} is an apocalyptic number.

It is an amenable number.

1288870779564 is an abundant number, since it is smaller than the sum of its proper divisors (1969108135536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1288870779564 is a wasteful number, since it uses less digits than its factorization.

1288870779564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35801966109 (or 35801966104 counting only the distinct ones).

The product of its (nonzero) digits is 379330560, while the sum is 72.

The spelling of 1288870779564 in words is "one trillion, two hundred eighty-eight billion, eight hundred seventy million, seven hundred seventy-nine thousand, five hundred sixty-four".